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Heart|Lab Grown|IGI

4.21ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG762509063

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG762509063

Diamond specifications and retailer prices

From $3,358 USD
£2,644 GBP
As of November 2, 2026
Save $12,262 USD (79%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $15,620 USD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 4.21ct lab-grown heart diamond

This 4.21ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG762509063 or 762509063. Listed at 21 retailers as of November 2, 2026, with prices from $3,358 to $15,620, a $12,262 spread on the same certified stone. Brilliant Earth lists it at $15,620. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.21
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762509063
Dimensions9.75 × 10.96 × 6.53 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.75 mm10.96 mm4.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762509063
Side View
Table 61.0%Crown 41.4°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 59.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $15,620 USD|Low: $3,358 USD|High: $15,620 USD|Avg: $6,472 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 19
Retailer 20
November 2, 2026
Retailer 13$3,358 USD
Retailer 10$3,476 USD
Retailer 8$3,782 USD
Retailer 7$3,892 USD
Retailer 3$3,940 USD
Retailer 19$4,032 USD
Retailer 12$4,157 USD
Retailer 20$4,185 USD
Retailer 4$5,038 USD
Retailer 2$5,052 USD
Retailer 14$5,388 USD
Retailer 16$5,808 USD
Retailer 5$5,861 USD
Retailer 18$8,581 USD
Retailer 15$8,637 USD
Retailer 17$8,706 USD
Retailer 11$10,172 USD
Retailer 9$11,190 USD
Retailer 6$14,179 USD
Brilliant Earth$15,620 USD

25 data points across 20 retailers

21 retailers$3,358 USD to $15,620 USD

A
Cheapest Retailer
-
$3,358 USD
£2,644 GBP
A
Retailer 2
-
$3,476 USD
View
A
Retailer 3
-
$3,782 USD
View
A
Retailer 4
-
$3,892 USD
View
Final sale: no returns
A
Retailer 5
-
$3,940 USD
View
A
Retailer 6
-
$4,032 USD
View
Retailer 7
-
$4,157 USD
View
Price last confirmed 20 days ago
A
Retailer 8
-
$4,185 USD
View
A
Retailer 9
-
$5,038 USD
View
A
Retailer 10
-
$5,052 USD
View
Retailer 11
-
$5,120 USD
HK$40,000 HKD
View
Price last confirmed 42 days ago
A
Retailer 12
-
$5,388 USD
£4,242 GBP
View
A
Retailer 13
-
$5,808 USD
View
A
Retailer 14
-
$5,861 USD
View
A
Retailer 15
-
$8,581 USD
ZAR 138,623 ZAR
View
A
Retailer 16
-
$8,637 USD
£6,801 GBP
View
B+
Retailer 17
-
$8,706 USD
A$13,394 AUD
View
B+
Retailer 18
-
$10,172 USD
View
B+
Retailer 19
-
$11,190 USD
View
B+
Retailer 20
-
$14,179 USD
View
Most Expensive
B+
Brilliant Earth
18181800A · Nov 2
$15,620 USD
View
20 more retailers have this diamond
Prices start from $3,358 USDSave up to $12,262 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
4.21ct Heart
$3,358 USD